JPH06120636A - Interconnection structure for board - Google Patents

Abstract

PURPOSE:To restrict a mother board inserted with boards to be interconnected to an absolute minimum size and to eliminate the need of cable for interconnecting mother boards. CONSTITUTION:A system bus mother board 4 secured with a connector 2 and a DRU mother board 5 secured with a connector 6 are arranged side by side wherein the DRU mother board 5 is provided with a connector 3 and the system bus mother board 4 is provided with a through hole 4C. A control board 1 having level difference between plug-in terminal parts 9 and 10 is then inserted into the connectors 2 and 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board-to-board connection for connecting a plurality of boards, and more particularly to a mounting structure for outputting a line interface of a communication control device to the outside.

[0002]

2. Description of the Related Art Generally, in a line control portion of a communication control device, a driver / receiver unit (hereinafter referred to as DR
U) method is used. For example, a board provided with a driver / receiver and a line connector is inserted into the other motherboard, and a line control board is inserted into one motherboard to connect the motherboards to connect the boards.

FIG. 2 is a schematic block diagram of a communication control device using the DRU method. The main processing unit 10 that performs processing associated with communication control is connected to a control unit 13 that performs line control as a line control module 18 by a system bus 11 in the communication control device. Further, the DRU module 19 is composed of a driver and a receiver 14 for converting an electric level of a line signal from the control unit 13 in accordance with an interface standard of each communication and a line connector 15 conforming to a physical standard of the communication interface. The driver / receiver 14 is connected to the controller 13 by a driver / receiver interface 17 which is a signal interface, and a communication line 16 is provided through a line connector 15.
Connected to.

3A and 3B are explanatory views showing a conventional board-to-board connection structure using a cable. FIG. 3A is a perspective view, and FIG.
Shows its side view. When considering mounting with a communication control device, since the control board 1 (corresponding to the line control module 18 shown in FIG. 2) having a large number of parts to be mounted generally has a high failure rate, it is easy to perform maintenance replacement. The DRU board 7 (corresponding to the DRU module 19 shown in FIG. 2) is inserted and removed from the cable and the cable is output to the outside via the line connector 8.
Is advantageous in maintenance of the device if it is mounted on the rear surface of the communication control device. In order to realize this, the system bus motherboard 4 as one motherboard and the DRU motherboard 5 as the other motherboard are opposed to each other, and the plug-in terminal portion 1 of the control board 1 as one board is arranged from the front side.
a, 1b are connectors 2, of the system bus motherboard 4
DRU board 7 as the other board from the rear surface
The plug-in terminal portion 7a can be inserted into and removed from the connector 6 of the DRU motherboard 5. The system bus output from the control board 1 is connected to the system bus motherboard 4 via the connector 2, and the connectors 2 are connected by a pattern on the motherboard (not shown).
The DRU interface signal output from the control board 1 is connected to the system bus motherboard 4 via the connector 3. A cable 24 connects between the system bus motherboard 4 and the DRU motherboard 5. By the way, a commonly used connector is a system in which a through hole is provided in a board and the legs of the connector are inserted and soldered therein, and the legs of the connector are exposed on the side opposite to the mounting surface of the connectors 2 and 3. Therefore, a special connector for directly connecting the connector of the cable 24 to the pin of the connector 3 of the control board 1 is used.

FIG. 4 is an explanatory view showing another example of the conventional board-to-board connection structure using a cable, FIG.
(B) shows the side view. In this example, the system bus motherboard 4, without using a special connector for directly connecting the cable connector to the connector 3 pin of the control board 1,
The DRU motherboard 5 is enlarged, and the connectors 21 and 21 of the cable 20 for connecting the motherboards are fixed to the system bus motherboard 4 and the DRU motherboard 5 by soldering.

[0006]

In the conventional board-to-board connection structure, a special cable is pulled out by inserting another connector into the leg of the connector protruding from the opposite side of the DRU interface connector of the control board. A connector is required, resulting in high cost. Furthermore, as the number of lines increases, the number of DRU interface cables between the system bus motherboard and the DRU motherboard increases in the device, and the space occupied in the housing increases. Further, there is a problem that the cost of the cable increases. It is an object of the present invention to provide a board-to-board connecting structure in which a mother board into which a board to be connected is inserted is made to have a necessary minimum size and a cable for connecting the mother boards is unnecessary.

[0007]

In order to achieve the above object, in the inter-board connection structure of the present invention, a mother board is provided with a gap between the board surfaces arranged in parallel, and the board surface of the other mother board is provided with one board. The connector is provided in the same direction as the connector, and one of the boards is provided with a plug terminal portion which has a step corresponding to the gap between the board surfaces and is inserted into each connector.

[0008]

When one board of the board-to-board connecting system configured as described above is inserted into one motherboard, the insertion terminal portion having the step portion is a connector between one motherboard and the other motherboard into which the other board is inserted. Since one board is inserted into the other board, one board is connected to the other board. Therefore, according to the present invention, the mother board into which the board to be connected is inserted is made to have a necessary minimum size, and a cable for connecting the mother board is not required.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. The elements common to the drawings are given the same reference numerals. 1A and 1B are explanatory views showing a board-to-board connecting structure of an embodiment, FIG. 1A is a perspective view, and FIG. 1B is a side view including a partially broken surface. The system bus motherboard 4 as one motherboard and the DRU motherboard 5 as the other motherboard are arranged so as to have a gap between the board surfaces 4b and 5a and overlap each other, and the control board 1 as one board is inserted. The connectors 2 and 3 are fixed to the board surfaces 4a and 5a in the same direction as the control board 1 by soldering.
Further, the DRU mother board 5 has a connector 6 for inserting a DRU substrate 7 as the other substrate fixed to the board surface 5b opposite to the board surface 5a to which the connector 3 is fixed by soldering. Connector 3 on system bus motherboard 4
A through hole 4C through which a later-described insertion terminal portion 10 of the control board 1 is inserted is provided on the board surface facing the. The control board 1 is provided with plug-in terminal portions 9 and 10 having a step corresponding to a gap between the system bus motherboard 4 and the DRU motherboard 5.

Next, the operation will be described. The plug-in terminal portions 7 of the DRU board 7 in which the plug-in terminal portions 9 and 10 of the control board 1 are respectively inserted into the connectors 2 and 3 and the line connector 8 is connected
Insert a into the connector 6. Therefore, control board 1 and DR
The U board 7 is connected by a pattern (not shown) provided on the DRU motherboard 5. Although the through hole 4C is provided in the system motherboard 4 in this embodiment, the through hole becomes unnecessary if a step is provided between the system bus motherboard 4 and the DRU motherboard 5. Needless to say, if a third motherboard is provided in the gap, a through hole is also provided in that motherboard.

[0011]

Since the present invention is configured as described above, it has the following effects. By inserting the plug-in terminal of one board into the connector of one motherboard and the connector of the other motherboard into which the other board is inserted, you can store expensive cables that do not require expensive cables to connect between the motherboards. Since the space for the communication is unnecessary, the communication control device can be downsized and the cost can be further reduced. Further, by overlapping one motherboard with another motherboard and providing a space through which the insertion terminal portion passes in one motherboard, the motherboard can be minimized and the communication control device can be downsized. .

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a board-to-board connection structure of an embodiment.

FIG. 2 is a schematic block diagram of a communication control device using the DRU method.

FIG. 3 is an explanatory diagram showing a conventional inter-substrate connection structure.

FIG. 4 is an explanatory view showing another example of the conventional inter-board connection structure.

[Explanation of symbols]

 1 Control Board 3 Connector 4 System Bus Motherboard 4C Through Hole 5 DRU Motherboard 7 DRU Board 10 Plug Terminal

Claims (3)

[Claims] 1. A board-to-board connecting structure in which one board is inserted into a connector of one motherboard and the other board is inserted into a connector of the other motherboard to connect one board and the other board, the motherboard is A gap is provided between the board surfaces arranged side by side, and a connector is provided on the board surface of the other mother board in the same direction as the connector of one board, and one board has a step corresponding to the above gap A board-to-board connection structure comprising an insertion terminal portion to be inserted. 2. The mother board is provided with a connector in the same direction as the connector of one board on the other overlapping board surface, and a space through which the insertion terminal portion passes is provided on the one board surface facing the connector. The board-to-board connection structure described in 1. 3. The inter-board connection structure according to claim 1, wherein a space through which the plug-in terminal portion passes is provided in a third motherboard disposed in the gap.